Impact of Feed Opening Width and Position on PVC Extrusion Process Effectiveness

J. W. Sikora; B. Samujło

doi:10.3139/217.2729

Article

Impact of Feed Opening Width and Position on PVC Extrusion Process Effectiveness

J. W. Sikora and B. Samujło

Published/Copyright: September 9, 2013

Published by

Become an author with De Gruyter Brill

Submit Manuscript Author Information

From the journal International Polymer Processing Volume 28 Issue 3

The influence of the feed opening axis width and position in relation to the plasticizing system axis on the effectiveness of the extrusion process of poly(vinyl) chloride has been studied. The research was conducted on the extrusion line for profiles with the extruder of the screw diameter 25 mm and L/D ratio = 25. In the extruder, the extruder head was mounted with a die of a rectangular cross-section shape for extruding a sheet of a defined width and thickness. The extruder was adapted for mounting five feed segments in the feed zone of the plasticizing unit; the segments differed from one another in terms of their feed opening width, the values of which were 0.6 D, 0.7 D, 0.8 D, 0.9 D and 1.0 D, respectively, whereas the values of the longitudinal axis shift of the opening relative to the longitudinal axis of the plasticizing unit were 0.2 D, 0.15 D, 0.10 D, 0.05 D and 0.0 D, respectively, which corresponded to 5 mm, 3.75 mm, 2.5 mm, 1.25 mm and 0 mm, respectively. The effectiveness of the polyvinyl chloride extrusion process was determined by dependences of extrudate temperature, extruder screw torque, polymer mass flow rate, power supplied to the extruder and conveyed by the polymer, unit energy consumption and energy efficiency of the extrusion process on the feed opening width and its axis position relative to the plasticizing unit axis, at different values of the screw rotational speed. It was stated that the width and position of the feed opening in relation to the plasticizing system axis can be adjusted in such a way that the extrusion process will be the most effective and other conclusions were also drawn.

² Mail address: Janusz W. Sikora, Lublin University of Technology, Department of Polymer Processing, Nadbystrzycka St. 36, 20-618 Lublin, Poland, E-mail: janusz.sikora@pollub.pl

References

BielińskiM., BurzyńskiP., “Dosage in Plastics Processing”, Polimery, 49, 275–282 (2004)Search in Google Scholar

ChristianoJ., “Improving the Energy Efficiency of A Barrel Heater – Cooler Design for High Temperature Single Screw Extrusion Application”, SPE ANTEC Tech. Papers, 1267–1271 (2011)Search in Google Scholar

Kenndaten für die Verarbeitung Thermoplastischer Kunststoffe. Teil 1. Thermodynamik, Hanser Publishers, Munich, Vienna (1979)Search in Google Scholar

FernandezJ. W., ClearyP. W., McBrideW., “Effect of Screw Design on Hopper Drawdown of Spherical Particles In A Horizontal Screw Feeder”, Chem. Eng. Sci., 66, 5585–5601 (2011)10.1016/j.ces.2011.07.043Search in Google Scholar

FranklandJ., “Don’t Forget Zone ‘Zero’”, Plastics Technology, 56, 14–15 (2010)Search in Google Scholar

FranklandJ., “Having Output Problems? Check Your Feed-port Design”, Plastics Technology, 56, 14–15 (2010)Search in Google Scholar

HarperC. A.: Modern Plastics Handbook, McGraw-Hill, New York, San Francisco (2000)Search in Google Scholar

LessmannJ. S., WeddigeR., SchoppnerV., PorschA., “Modelling the Solids Throughput of Single Screw Smooth Barrel Extruders as A Function of the Feed Section Parameters”, Int. Polym. Proc., 27, 469–477 (2012)10.3139/217.2588Search in Google Scholar

MengesG., HoffmannW.: Die direkte Wiederverarbeitung von Unvorbereiteten Kunststoffabfallen im Einschneckenproduktionsextruder, Aufbereiten von Kunststoffabfallen, VDI-Verlag, Düsseldorf (1973)Search in Google Scholar

RauwendaalC.: Polymer Extrusion, Hanser Publishers, Munich (2001)Search in Google Scholar

RauwendaalC.: Understanding Extrusion, Hanser Publishers, Munich (1998)Search in Google Scholar

RobertsA. W., “Predicting the Volumetric and Torque Characteristics of Screw Feeders”, Bulk Solids Handling, 16, 233–244 (1996)Search in Google Scholar

SikoraJ. W., “The Effect of Construction Modifications of the Extruder Barrel Groove Zone on the Autothermal Extrusion Process”, Polimery, 43, 548–554 (1998)10.14314/polimery.1998.548Search in Google Scholar

SikoraJ. W., SasimowskiE., “Processing Unit with Rotational Cylinder Segment, Process Results”, Kunststoffe International, 9, 89–94 (2006)Search in Google Scholar

SikoraJ. W.: Selected Problems of Polymer Extrusion, WNGB Scientific Press, Lublin (2008).Search in Google Scholar

SikoraR.: Przetwórstwo tworzyw polimerowych. Podstawy logiczne, formalne i terminologiczne terminologiczne [Polymer Processing. Logical, Formal, and Terminological Foundations], Lublin University of Technology Press, Lublin (2006)Search in Google Scholar

TokidaS., “Optimization of the Geometry of Feed Throat in Injection Molding Machine”, Hinshitsu Kogaku, 15, 174–180 (2007)Search in Google Scholar

Tor SwiatekA., “Characteristics of Physical Structure of Poly(vinyl chloride) Extrudate Modified with Microspheres”, Polimery, 57, 577–580 (2012)10.14314/polimery.2012.577Search in Google Scholar

UnacR. O., VidalesA. M., BenegasO. A., IppolitoI., “Experimental Study of Discharge Rate Fluctuations in A Silo with Different Hopper Geometry”, Powder Technol., 225, 214–220 (2012)10.1016/j.powtec.2012.04.013Search in Google Scholar

WhiteJ. L., PotenteH.: Screw Extrusion, Hanser Publishers, Munich (2003)Search in Google Scholar

Received: 2012-11-10

Accepted: 2013-2-7

Published Online: 2013-09-09

Published in Print: 2013-07-01

You are currently not able to access this content.

Articles in the same Issue

https://doi.org/10.3139/217.2729